2.2 Structure of Atoms

Question 1

What are the 3 subatomic particles?

Answer 1

Protons, neutrons, and electrons

Question 2

regions around the nucleus in which a given electron or electron pair is likely to be found most of the time

Answer 2

Orbitals

Question 3

total number of protons (and electrons)

Answer 3

Atomic Number

Question 4

number of protons and neutrons

Answer 4

Mass number

Question 5

different atomic forms of the same element; varying number of neutrons

Answer 5

Isotopes

Question 6

average weight of ALL isotopes of an element, accounting for its abundance in nature (more common isotopes count for more)

Answer 6

Atomic Weight

Question 7

isotopes that go through the process of atomic decay

Answer 7

Radioisitopes

Question 8

packets of 2p + 2n

Answer 8

a-alpha particles

Question 9

electron-like negative particles

Answer 9

B-beta particles

Question 10

electromagnetic energy

Answer 10

Y-gamma rays

Question 11

When does the disintegration of a radioactive nucleus occur?

Answer 11

When a, B, or Y are ejected from the nucleus

Question 12

even smaller nuclear particles that associate in one way to form protons and another way to form neutrons

Answer 12

Quarks

Question 13

the time required for a radioisotope to lose one-half of its activity

Answer 13

Half-life